| Title: |
Quantitative comparison between Type Ia supernova spectra at low and high redshifts: A case study |
| Authors: |
Supernova Cosmology Project; Nugent, Peter E.; Garavini, G.; Folatelli, G.; Nobili, S.; Aldering, G.; Amanullah, R.; Antilogus, P.; Astier, P.; Blanc, G.; Bronder, J.; Burns, M. S.; Conley, A.; Deustua, S. E.; Doi, M.; Fabbro, S.; Fadeyev, V.; Gibbons, R.; Goldhaber, G.; Goobar, A.; Groom, D. E.; Hook, I.; Howell, D. A.; Kashikawa, N.; Kim, A. G.; Kowalski, M.; Kuznetsova, N.; Lee, B. C.; Lidman, C.; Mendez, J.; Morokuma, T.; Motohara, K.; Nugent, P. E.; Pain, R.; Perlmutter, S.; Quimby, R.; Raux, J.; Regnault, N.; Ruiz-Lapuente, P.; Sainton, G.; Schahmaneche, K.; Smith, E.; Spadafora, A. L.; Stanishev, V.; Thomas, R. C.; Walton, N. A.; Wang, L.; Wood-Vasey, W. M.; Yasuda, N. |
| Contributors: |
Lawrence Berkeley National Laboratory. Computational Research Division.; Lawrence Berkeley National Laboratory. Physics Division. |
| Source: |
Journal Name: Astronomy and Astrophysics; Journal Volume: 470; Journal Issue: 2; Related Information: Journal Publication Date: August I 2007 |
| Publisher Information: |
Lawrence Berkeley National Laboratory |
| Publication Year: |
2008 |
| Collection: |
University of North Texas: UNT Digital Library |
| Subject Terms: |
Spectra; Absorption; Cosmology; Supernovae Stars: Supernovae: General; Cosmology: Early Universe; Stars: Supernovae: General |
| Time: |
72; 79 |
| Description: |
We develop a method to measure the strength of the absorption features in type Ia supernova (SN Ia) spectra and use it to make a quantitative comparisons between the spectra of type Ia supernovae at low and high redshifts. In this case study, we apply the method to 12 high-redshift (0.212 = z = 0.912) SNe Ia observed by the Supernova Cosmology Project. Through measurements of the strengths of these features and of the blueshift of theabsorption minimum in Ca ii H&K, we show that the spectra of the high-redshift SNe Ia are quantitatively similar to spectra of nearby SNe Ia (z< 0.15). One supernova in our high redshift sample, SN 2002fd at z = 0.279, is found to have spectral characteristics that are associated with peculiar SN 1991T/SN 1999aa-like supernovae. |
| Document Type: |
article in journal/newspaper |
| File Description: |
Text |
| Language: |
English |
| Relation: |
osti: 934981; https://digital.library.unt.edu/ark:/67531/metadc901487/; ark: ark:/67531/metadc901487 |
| Availability: |
https://digital.library.unt.edu/ark:/67531/metadc901487/ |
| Accession Number: |
edsbas.22C75D8A |
| Database: |
BASE |